86693791 has 2 divisors, whose sum is σ = 86693792. Its totient is φ = 86693790.

The previous prime is 86693777. The next prime is 86693807. The reversal of 86693791 is 19739668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86693791 - 2⁵ = 86693759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86693741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43346895 + 43346896.

It is an arithmetic number, because the mean of its divisors is an integer number (43346896).

Almost surely, 2^86693791 is an apocalyptic number.

86693791 is a deficient number, since it is larger than the sum of its proper divisors (1).

86693791 is an equidigital number, since it uses as much as digits as its factorization.

86693791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 86693791 is about 9310.9500589360. The cubic root of 86693791 is about 442.5842941119.

The spelling of 86693791 in words is "eighty-six million, six hundred ninety-three thousand, seven hundred ninety-one".